Working with clients is incredibly rewarding, and being creative with how workouts are to be achieved is also enjoyable. The clientele base is provided by the employer.
What I wish was different
Not a full time position to start, gaining a clientele is a slow process. Perhaps providing a slightly larger clientele base to start with might be more encouraging for a new employee.
Advice
When working with special-needs populations you must be extremely diligent, patient, and willing to be creative to accommodate an individual's needs.